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JSON Validator
Check whether JSON is syntactically valid.
Processed locally
LocalAuto
Input
JSON
Output
Process the input to see the result here.
About this tool
Check whether JSON is syntactically valid.
Standard tool execution runs in the browser, with no dedicated backend for processing inputs.
How to use
- Paste or enter data in the input panel.
- Use Process, or let automatic processing run when available.
- Review the result, copy the output, and validate it before critical use.
Common use cases
- Validate an object
Quick examples
Validate an object
Input: {"ok":true}
Output: Valid JSON
JSON Validator FAQ
Does the validator check syntax or business rules?
It checks JSON syntax only.
Does it validate JSON Schema?
No. Schema validation requires an additional specialized validator.
What is returned when JSON is valid?
It returns the message Valid JSON.
What happens when JSON is invalid?
It returns an error indicating malformed JSON syntax.
Is my JSON sent to an external service?
No. Validation is local in the browser.
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